62 BATHTMETRICAL DISTRIBUTION. 



Thecocyathus lsevigatus. 

 Lophohelia prolifera. 

 Stylaster erubescens. 

 Allopora miniata. 

 Distichopora foliaeea. 

 Thecopsammia tintinnabulum. 

 Thecopsammia socialis. 

 Dendrophyllia cornucopia. 

 Dendrophyllia cyathoides. 

 Diaseris pusilla. 

 Diaseris crispa. 

 Pliobothrus symmetricus. 

 Pliobothrus tubulatus. 

 In the Globigerina mud we find only the following species : — 

 Caryophyllia cornuformis (living). 

 Paracyathus folliculus (dead). 

 Diplohelia profunda (dead). 

 Fungia symmetrica (dead). 

 Haplophyllia paradoxa (living). 

 On the whole the differences between these different regions arc not 

 very great, at least as far as family and generic characters go. But the 

 differences from the nearest reef fauna are. as might he expected, very 

 striking. No Astraeidae, no Madreporidaa (excluding the Eupsam- 

 midae), the most abundant families in species and in individuals on the 

 West Indian reels, extend to any considerable depth. The families hav- 

 ing apparently the greatest range in depth are the Oculinidae, the 

 Stylasteridae, and the Milleporidse. 



Simple corals which form such a large proportion of the deep-sea 

 fauna are not represented at all in the Floridian reef fauna : some 

 species are described from the West Indies, but without indications of 

 depth. 



The specimens of soundings brought up by the lead from the Gulf 

 Stream farther north contain frequently small fragments of corals, of 

 which the following have been determined : — 



Cryptohelia Peircei, lat. 31° 32' X.. long. 7S 20' W.. 600 fathoms. 

 Distichopora foliaeea, lat. 31 32' X.. long. 78 20' W.. 600 fathoms. 

 Stylaster erubescens, lat. 31° 32' X.. Ion-. 78 20' W.. 600 fathoms. 

 Lepidopora glabra, lat. 31° 32' X.. long.^TS 20' W.. 600 fathoms. 

 Diplohelia profunda, lat. 30° l.V X.. long. 79° 35J' W.. 530 fathoms. 

 Caryophyllia formosa. lat. 30 H-' X.. long. 79° 35} 530 fathoms. 

 Stylaster erubescens. lat. 29 € 4S' X.. lung. 79° 17' W., 450 fathoms. 

 Lepidopora glabra, lat. 29° 48' X.. long. 79° 17' W.. 450 fathoms. 

 Diplohelia profunda, lat. 28° 53A/ X.. 'long. 79° 33f W.. 410 fathoms. 

 These Idealities are all in or near the axis of the Gulf Stream, be- 



